Governor.



. PATENTED JUNE 25, 1907. G. ANDREWS & T. JACKSON.

GOVERNOR.

APPLIOATION FILED JULY 31. 1906.

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CHARLES AN REWS and g g IT-\QMAS JACKSON,

. A ET l I ATTQBNEY.

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No. 858,320. PATENTED JUNE 25 1907.

O. ANDREWS &"T. JACKSON.

GOVERNOR.

APILIUA'I'ION TILED JULY 31. 1908.

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THOMAS JACKSON, W MM BY MMQWMMM ATTORNEY.

PATENTED JUNE 25, 1907.

G. ANDREWS & T. JACKSON.

GOVERNOR.

APPLICATION IILED- JULY 31, 1906.

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'No. 858,320. PATENTED JUNE 25, 1907. O. ANDREWS & T. JACKSON.

GOVERNOR.

APPLICATION FILED J LY 31. 1906.

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No. 858,320. I PATENTED JUNE 25,- 1907. G. ANDREWS & T-. JACKSON.

GOVERNOR.

APPLICATION FILED JULY a1. 1906.

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CHAR LES ANDREW a d WITNESSES) BYTHQMAS J CKSON,

1n: NORRIS PETERS co, WASHINGTON, D. c,

UNITED STATES PATENT OFFICE.

OHARLESANDREWS AND THOMAS JACKSON, OF LONDON, ENGLAND, AS- SIGNORS TO ANDREWS GOVERNOR PATENTS LIMITED, OF LONDON ENGLAND.

GOVERNOR.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed July 31, 1906. Serial No. 328,527.

To all whom it may concern:

Be it known that we, CHARLES ANDREWS and THOMAS J AOKSON, subjects of the King of Great Britain and Ireland, residing at London, England, have invented new and useful Improvements in Governors, of which the following is a specification.

This invention relates to a governor for use on board ship, and consists in a device which serves to anticipate the tendency of the governor to act beforethere is any direct change of speed, and which, when the device has reverted to normal condition, serves to release the fluid holding up the governor piston so as to'allow it to come back at once to its normal osition.

It is wel known that where a marine engine is to be governed, as regards racing, it is essential for its success that the action of the governor must anticipate the tendency of the engine to race, so as to commence the reduction of the steam to the engine before any portion of the propeller has become clear of the water, because the retarding effect of the water upon the propeller has not at that time been removed. It is to fulfil this object that the present device has been invented.

In order that the invention may be the better understood, we will now proceed to describe the same in relation to the accom panying drawings, reference being had to the letters and figures marked thereon.

Figure 1 is a side elevation of a control device constructed in accordance with this in vention. Fig. 2 is a sectional elevation of the same taken on the line UV, Fig. 5, showing the internal parts of the apparatus necessary to understand the working of the invention. Fig. 3 is an end elevation of the same. Fig. 4 is a side elevation on the opposite side to that shown in Fig. 1. Fig. 5 is a transverse sectional plan on the-line YZ of Fig. 2. Fig. 6 is a vertical section on the line WX of Fig. 5. Fig. 7 is a modified arrangement of the device for dealing with.

conditions of working within narrower limits than can be effected with the simpler form of apparatus shown in the other figures.

To carry the invention into effect we arrange a metal tube a adapted to contain mercury or other liquid or equivalently rolling elements which can move from one end of the tube to the other on the said tubebeing inclined in one direction or the other as the case may be. This tube is carried in a cage b which is pivoted on an axle 0 supported in lugs d, (1 formed on the upper part of the casting containing the controller piston (Fig. 2) for operating the valve or other controlling device. The tube a is limited in its travel on either side of the horizontal by two adjustable stops e fitted with lock nuts f.

The cage 6 carries two lugs g and 9, one on one side of the axis of movement and one on the other. For the purpose of descri tion we will at present only deal with the ugg and leave the description with reference to the other lug 9 till later. The lug g has an adjustable screw 72. screwed therein which can be locked by means of a lock nut i. The end of the said screw 77, coacts With the stem 71 of a valve mounted in the upper part of the casting and. fitted with a spring is (Fig. 6) which tends to keep the valve in the closed position.

The space at the under side of the controller piston Z communicates by the passage m (Fig. 2 and Fig. 5) with the underside of the valve n so that the pressure of fluid under the piston Z also tends to close the valve n (Fig. 6) upon its seat. The other side of the valve communicates with the passage 0 leading into the exhaust passage 1) (Figs. 2 and 5) which is connected to the tank or reservoir containing the fluid. Upon the end of the axle c opposite to that on which the tube a is carried we arrange an arm Q (see Fig. 1) on the end of which we pivot a detent 1' having an engaging claw at its lower end adapted to co-act with a notch or shoulder s on the operating rod tof the plug cook a (Fig. 2 The tube a is slidingly mounted in the rocking cage 1) and is held and adjusted therein by means of a hand adjusted screw 0 (Figs. 3 and 1) which engages with the cage 1) so that the position of the tube a may be adjusted as to have a greater or less tendency to lift at one end to suit the trim of the vessel and to prevent the operation of the device forsmall angles of inclination of the ship to the hori zontal. tube a in the position as shown in Fig. 1, the valve n is maintained in the open position by the weight of the tube and mercury contained therein so that the liquid under the piston Z can pass away to the tank or reservoir through the plug cook a and also through the valve n by means of the passages When the mercury has inclined the 0 and 90. When, however, the inclination of the ship alters and the propeller is traveling upward, the tube it gradually follows such movement from its inclined position in one direction into the horizontal position so that the mercury runs from one end of the tube toward the other, and when sufliciently inclined in the opposite direction overbalances the tube a into the extreme opposite position, allows the spring 76 and fluid pressure to close the valve n; and at the same time, by engaging the rod 25, the detent 1" partially closes the plug of the cock to, increasing the pressure under the controller piston Z and causing the said piston to rise within the controller and operate the valve gear thus cutting off more or less of the steam as the case may be. As the ship returns to its initial position, during which return the propeller becomes more submerged, the tube a again reaches the horizontal position when the mercury returns to the original end of the tube overbalancing it about the axis of the shaft 0, allows the cock u to be drawn into the open position by the spring w and the mercury by its weight on the stem i of the valve it opens the latter and allows the liquid under pressure to pass by means of the passage m through the valve a into the exhaust passage p, the relief of such pressure allowing the piston Z of the controller to be pushed down by its spring and to open the main throttle valve in the usual way.

We have found in practice that in certain cases it is possible to arrange the apparatus to work by means of the valve a only, without any coaction with the plug cook it, and to utilize the action of the tube a to throw the connecting rod 2? out of engagement with the tooth 00 carried by the controller piston rod; also to provide a lug g screw 71, locknut i and second valve n on the opposite side of the shaft 0 so as to make the tube a operative for head-seas as well as stern-seas and also to provide means by which a quarter-race, halfrace, or threequarter-race can be dealt with. For this purpose instead of the one engaging catch on the connecting rod t, we provide a series (see Fig. 7) of engaging catches y with which the tooth or; can engage so that the tooth at can pick up the rod 25 at intermediate points in the travel of the controller piston. The arm g in this instance is altered in position on the shaft 0 and is provided with a projecting pin 2 so as to engage with a curved branch 2 carried by the connecting rod t. The curvature of this branch .2 where it coacts with the pine is such that if the pin .2 were stationary a movement of the rod t in an upward direction (the lower part of which movement would be in a circle about the axis of the plug 'LL) would cause the upper end of the connecting-rod t to be moved to the right (Fig. 7) so that such movement would disengage the tooth x from the particular notch y with which itwas engaged. In this way when the tube a is tilted from the position shown i1 1. Fig. 6 into the opposite position owing to a change in the trim of the vessel, the movement of the pin 2-relative to the curved surface of the branch 2 forces the upper end of the rod 15 toward the right so as to disengage the particular notch y from the tooth at, allowing the spring to to move the plug cock 1/. into a more open position.

By means of this device we are able to adjust the tube a of the apparatus so as to deal with quarter, half, or threequarter races of the engine either from a head-sea or a stern. sea at any portion of the travel of the controller piston and allow the said piston to pick up its engagement with the connecting rod t at the proper moment.

By reference to Figs. 5 and 6, it will be seen that the valves n and n are both in communication with the underside of the controller piston Z by means of the passage m, while the communication. with the valve 11 to the exhaust passage p is by means of the passage 0 running into the passage m (see Fig. 5).

In order to disengage the tooth at from any notch y when the controller piston reaches the top of its stroke a pin 00 (Figs. 1 and 7 on the tooth a: travels up a slot 'LU which has a curved end 1 arranged to cause the catch 00 to move from right to left. According as to whether it is desired that the tube a on. its inclination being altered by a rise of the stem or the stern of the vessel the screws It 71 are adjusted so as to effect the operation of either the valve a or the valve it according as to which inclination of the tube is to perform. the controlling function.

Having now described. our invention, what we claim and desire to secure by Letters latent is 1. In a governing device in which the controlling element is operated by fluid pressure, the combination of a tiltable device mounted upon an axis and adapted to rock thereon, a mobile body or bodies carried by said device and adapted to move on said device from one side of the axis of movement to the other under the action of gravity, with means for controlling the fluid pressure of the controlling element of the governor, substantially as described.

2. In a governing device in which the controlling element is operated by fluid pressure, the combination of a tube pivoted on a trans verse axis at or near its center, a mobile body or bodies contained in said tube and a liquid control device adapted to control the passage of the fluid. from under the controller piston, with means for operating said liquid control device by the movement of the pivoted. tube, substantially as described.

3. In a governing device in which. the controlling element is operated by fluid pressure,

lOO

the combination of a tube pivoted on a transverse axis at or near its center, a mobile body or bodies contained in said tube, and a liquid control device adapted to control the passage of the fluid from under the controller piston, with means for operating said liquid control device by the movement of the pivoted tube, means for adjusting the pivoted tube relative to the axis of movement and adjustable stops for controlling the angular motion of said tube and its co-action with the control valve, substantially as described.

4. In a governing device in which the controlling element is operated by fluid pressure, the combination of a tube pivoted on a transverse aXis at or near its center, a mobile body or bodies contained in said tube, and two liquid control devices adapted to control the passage of the liquid from under the controller piston, in combination with means for putting either one or other liquid control device into action when the pivoted tube is tilted either to one side or the other side on its pivot as the case may be, substantially as described.

5. In a governing device in which the controlling element is operated by fluid pressure, the combination of a tube pivoted on a transverse aXis at or near its center, a mobile body or bodies contained in said tube, and a liquid control device adapted to control the passage of the fluid from under the controller piston, With means for operating said liquid control device by the movement of the pivoted tube, and means controlled by the pivoted tube adapted to disengage the connecting means between the liquid control valve and the controller piston, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

CHARLES ANDREWS. THOMAS JACKSON. Witnesses:

CHARLEs CARTER, RICHARD A. HOFFMANN. 

